Friction Force Calculator Formula
Understand the math behind the friction force calculator. Each variable explained with a worked example.
Formulas Used
Friction Force
friction = mu * normal_forceVariables
| Variable | Description | Default |
|---|---|---|
mu | Coefficient of Friction | 0.5 |
normal_force | Normal Force(N) | 100 |
How It Works
Friction Force
Friction opposes relative motion between two surfaces in contact.
Formula
f = mu * N
where mu is the coefficient of friction (static or kinetic) and N is the normal force perpendicular to the surface.
Worked Example
A 10 kg box on a flat floor has a kinetic friction coefficient of 0.5.
mu = 0.5normal_force = 98.1
- 01Normal force N = m * g = 10 * 9.81 = 98.1 N
- 02f = mu * N
- 03f = 0.5 * 98.1
- 04f = 49.05 N
Ready to run the numbers?
Open Friction Force Calculator